<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title>单元格内容水平对齐属性</title>
	</head>
	<body>
		<table border="1" width="300" heigh="50">
			<tr>
				<td>第一行1</td>
				<td>第二行2</td>
				<td>第三行3</td>
			</tr>
		</table>
	</body>
</html>